Eccentric driving gear



Nov. 3, 1931. J. REID ECCENTRIC DRIVING' GEAR Original Filed June 25,1927 .v .MAN

Patented Nov. 3,Y 1.931'

UNITED STATES PATNT OFFICE JOHN REID, OF OIL CITY, PENNSYLVANIA,ASSIGNOR TO JOSEPH YREIT) GAS ENGINE ,l

COMPANY, 0F OIL CITY, PENNSYLVANIA EccnNTnic DRIVING enen Originalapplication led .Tune 25, 1927, Serial No. 201,412.' Divided andV thisyapplication filed March 1, 1930. serial No.4aa532. p p l y, f

rIhis invention relates to horizontal eccentric driving gears such asare used in pumping plants, and particularly to a means for providingadequate lubrication for the same while preventing the scattering oflubricating oil.4

In the usual construction at the present time there is nothing but a lowlip around the periphery of the eccentric to prevent the lubricating oilfrom being thrown off by cen' trifugal force from the lower edge of theeccentric after passing down between the bearing surfaces. Any excessoil is thrown toward the portion of this lip furthest removed from thecenterof rotation and spills over the edge. Itis diiicult to regulatethe supply of oil so that there will be suicient to properly lubricatethe bearing surfaces without having some spilling over the abovementioned 1i pAccording to the present invention the lip is extendedupward to substantially the height of the bearing surfaces, and ispreferably curved inward at the top, thus forming a ring shaped cup ofadequate proportions for catching the oil discharging from the loweredges of the bearing surfaces.

Most of the oil is thrown by centrifugal force to that portion of thecup furthest removed from the center of rotation of the eccentric, andforms there a relatively deep pool. In accordance with another featureof the invention I provide a pump having an intake terminating in thisdeep pool of oil and a delivery tube for supplying oil to the bearingsurfaces. I am therefore -able to supply the bearing surfaces with acontinuous flow of oil and thereby obtain maximum efciency oflubrication. The pump is conveniently operated by means of a cam surfaceon 'he eccentric ring, since the pump is secured to the eccentric andtravels around the ring.

This application is a division of my copending application Serial No.201,412 and its purpose is to cover one particular form of the inventiondescribed in the said copend ing application. Reference is made to thesaid cto-pending application for a description of the generalarrangement of the eccentric driving gear with which this invention isparticularly adapted to be used. Thisdescription willbe confined to thelubricating device and the parts of the eccentric driving gear withwhich it cooperates. VIn the drawings JlFig. l is a verticalradialsection of the outer portion of aneccentric and eccentric strap,showing the lubricating device. Fig. 2 is a horizontal section on theline 2-2 of Fig. 1, and

' Fig. 3 is a vertical section on the line 3-3 ofFig. 2.`

VTo a driving member l is secured an eccentric 3 havingv a peripheralbearing surface 5 surrounded by the bearing surface 6 of eccentric ring40. The eccentric has an outwardly and upwardly extending lip 8-arranged to catch the lubricating oil thrown out by centrifugal forcefrom the lower end of-bearingsurfaces 5, 6. Atthe part of theeccentricfurthest removed from its axis (not shown) is a basin 34 extending fromthe inner side of the lip 8 underth'e lower edge of eccentric strap40'and in behind the bearing surface 5 of the eccentric. The rim of theeccentric is provided with an opening 35,V

in which is mounted a pump consisting of a stationary plunger 36,secured in a bracket 37 by a set screw 38, and a cylinder 39 slidablymounted on the plunger. Cylinder 39 lies under the lower edge ofeccentric ring 40 and is provided with a `slot 4l which engages saidlower edge. The lower edge of the eccentric ring is formed with one ormore eccentric portions 40 which gradually slope` into the concentricportions. The slot 4l fol-A lows the undulations of the lower edge ofthe eccentric ring.. as the eccentric rotates and causes the cylinder toreciprocate. The cylin- V der is guided by lianges 42 and ribs 43. -Anintake opening44 is provided in the cylinder and a longitudinal passage45 in the plunger 36 leads to a delivery'tube27 in which is 'I inserteda check valve 47. -The intake openi'ng 44 is controlled by the plunger36. 1

The' eccentric is extended upward `at 48 laV short distance above thetop of the bearing ,surfacesl 5, 6, thus forming a well 49adapted toreceive oil delivered bythe pump." A recess V5() in the eccentriccommunicates with the well 49 and has oil grooves 5l radiatingdownwardly from it along the bearing surfaces. The delivery tube 27terminates in a hole 52 leading into the recess 50. Holes 53 are spacedat suitable distances around the eccentric ring to let oil suiicient oilinto the n space enclosed by lip 8 to prevent oil from.

spilling over the extension 48.

rlhe oil which is thrown out from the lower end ot the bearing surfaces5, 6 is caughtby the lip 8 and thrown by centrifugal force into that endof the lip which is furthest removed romthe center of rotation of theeccentric.

rIhere it' forms a deep pool 'covering the in'-y tale opening of thepump, which sucks up the oil and forces it through the delivery tube tothe recess 50 and well 4:9. The oil then runs through grooves 5l andthoroughly lubricates the bearing surfaces. Some of the oil is thrownout through holes 53 into the space enclosed by lip 8 and the number andsize of the holes is so proportioned to the capacity of the pump thatthe oil is not vpermitted to rise in well i9 suiliciently high to spillover extension 48. K

Having described my invention, I claim i. ln combination with ahorizontal eccentric driving gear, comprising an eccentric and aneccentric ring cooperating therewith, and having a lip extendingoutwardlyirom the bottom of said eccentric and then upward ly tosubstantially the height of saidreccene tric; an oil pump mounted' onsaid eccentric; a suction conduit for said pump opening into the spaceenclosed by said lip at the portion thereof furthest removed from thecenter of rotationot the eccentric; a delivery conduit for said pumpcommunicating with the bearing surfacesl of the eccentric and eccentricring; the lower edge of said eccentric ring having an eccentric portion,and said pump having a reciprocable operating member provided with arecess in which said lower edge rides.

2. in combi-.nation with a horizontal eccentric driving gear, comprisingan eccentric and aneccentric ring cooperating therewith, and having alip extending outwardly from the bottom opsaid eccentric and theupwardly to substantially the height of said eccentric;

van oi-lpump mounted on said eccentric at the portion furthest removedfrom its center of rotation, comprising a` iiXed plunger and a cylinderreciprocable on said plunger; said cylinder lying under the low-er edgeor" said eccentric ring and having a `recess in which said lower edgerides; said lower edge having an eccentric portion; an intake openingin. said cylinder; an oil passa-ge in said plunger; and. a conduitconnecting said passage with Vthe bearing surfaces of the eccentric andeccentric ring.

aThe foregoing specification signed at Oil City, Pa., this 20th day ofDecember, 1929.

Y JOHN REID.

